bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

[root@localhost ~]# pip install html5lib

DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support

Requirement already satisfied: html5lib in /usr/lib/python2.7/site-packages (0.999)

[root@localhost ~]# pip install lxml

DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support

Collecting lxml

  Downloading lxml-4.5.2-cp27-cp27mu-manylinux1_x86_64.whl (5.5 MB)

     |████████████████████████████████| 5.5 MB 32.2 MB/s

Installing collected packages: lxml